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Thread: Chlorine strength question

  1. Back To Top    #1

    Join Date
    Jul 2011
    Northern MN

    Chlorine strength question

    Quick question: I have some liquid chlorine that says "12.5% sodium hydrochlorate, 87.5% other ingredients, and 15% available chlorine". As far as the pool calculator, is this 12.5% or 15%?

    24-ft round Radiant AG, fully in the ground, 14,500 gal
    Sand filter, 1.5 HP pump, vinyl liner
    9 months of winter, 3 months of tough skating!

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Chlorine strength question

    Use 12.5%. Their calculation of Available Chlorine has to be wrong, but odds are they aren't at 15% strength. If you find you are getting a higher FC than you expected, then you can always use 15%.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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